Make a bike trailer for less than $10 !

Step 3 Wheel assembly

For the wheel assembly you will need:

2 x Bike wheels
2 x 3/8" hex bolts with 2 washers and a nut for each bolt (The bolts are 6 1/2" long)
2 x 2x4s (Approximately 48 inches long)
4 x Wood blocks from scrap wood (Ideally 2x4 pieces, all cut into 3 1/4 inch wide blocks)
1 x Bag of 2 1/4" Wood screws
1 x Cordless drill with a 3/8" drill bit and a smaller bit for pre-drilling screw holes

Procedure:'''

1. Remove any bolts from the middle of the bike tires using wrenches and a lubricant such as WD-40.

2. Select 2 of the 48" 2x4s to be the rails for the wheel assembly. Next measure in 23" from one end of the 2x4 and make a mark for drilling. (Make the mark close to the middle of the board, around 1 3/4" from the top on the flat side of the 2x4.) Drill a hole through the mark with the 3/8" drill bit, try to keep the drill as straight as possible. After drilling the first hole, lean the trailer body up on one side and place the 2x4 on top of the side. Line up the 2x4 with the trailer body edge. Drill through the first hole in the rail and into the 2x4 on the side of the trailer body. Try pushing the 3/8" hex bolt through the holes to see if it will fit. Use the drill to bore the holes slightly wider until the bolt fits through both holes easily.

3. Place 4 of the 3 1/2" wide block between the rail and the trailer body. Slip one of the bike wheels into the center where the bolt hole was drilled. Place 2 of the blocks at each end of the rail, connecting it to the trailer body. Place 2 of the 3 1/2" blocks closer to the wheel for added support. Remove the wheel and predrill 2 holes through the rail at each location of a wood block. Secure the rail to the blocks using woodscrews in the pre drilled holes. Flip the rail and trailer body over on to the other side and predrill holes to secure the block/rail assembly to the trailer body. Secure the woodblocks to the trailer body using 2 wood screws for each block.

4. Repeat steps 2 and 3 for the rail on the opposite side of the trailer.

5. Flip the trailer body on one side and use the 3/8" hex bolts to check that the bolt holes fit. Install the wheel by securing it through the bolt with one washer on each end of the bolt and with the nut secured on the inside of the trailer body. Tighten the nut until there is very little gap between the wheel and the rail. Loosen slightly if the wheel won't turn. Flip the trailer on the other side and secure the other wheel using the same process.